ST-Links PgMap is the free ArcGIS extension For directly connecting to PostGIS (PostgreSQL) spatial databases without ArcSDE. PgMap 2.0 works with ArcGIS 10.

PostGIS is the most popular open source spatial database.PgMap helps you to use the advantages of PostGIS spatial database without spending money on ArcSDE and ArcInfo.
ST-Links PgMap features :
- Work with Postgresql / PostGIS, MS SQL Server, Oracle, MySQL
- Seamless integrated with ArcMap
- Use spatial tables and/or views as ArcMap Feature layers
- Edit and save feature layers to databases within ArcMap Editing Session
- Support multi-connections
- Support multi-databases and various database systems
- Save connections and layer information in map documents
- Provide functions to convert ESRI feature classes and spatial databases tables
- FREE
The download has a nice PDF to document the capabilities, which include viewing, editing, etc
Download ST-Links PgMap here




